condition mean min max ZT0-3 0.48939950000000004 0.462387 0.5164120000000001 ZT4-7 0.7322915 0.7322915 0.7322915 ZT8-11 0.984114 0.984114 0.984114 ZT12-15 0 0 0 ZT16-19 0.5314605 0.5314605 0.5314605 ZT20-23 0.534725 0.534725 0.534725